KR800000375B1 - Lighting device of fluorescent discharge tube - Google Patents

Abstract

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Description

Lighting device of fluorescent discharge tube

1 is a circuit diagram showing the present invention.

2 and 3 are circuit diagrams showing another embodiment of the present invention, respectively.

4 is a time record table showing characteristics of circuit components of the apparatus of the present invention.

5 and 6 are comparative characteristic diagrams showing the starting lighting characteristics of the apparatus of the present invention, respectively.

The present invention relates to a fluorescent lamp lighting device of the resistance ballast (BALLAST) method, in particular characterized in that the lighting start means.

In order to light up the preheating-type fluorescent discharge tube in a stable state, a control device for lamp current is required in an electric circuit.

To this end, conventionally, a choke ballast method using a ballast made of choke coils has been mainly adopted. As another example, a resistance ballast method using a resistance wire or an incandescent lamp is employed.

In order to light up this kind of discharge tube, a preheating circuit for heating both electrodes and a kick voltage generating circuit for obtaining a high starting voltage are required prior to the start of the discharge in order to start the lighting start, that is, inter-polar discharge.

This preheating circuit device requires a circuit opening / closing operation unit that closes the current path flowing in the filaments of both electrodes during the initial short time of the lighting operation (power supply). GLOW start has been used a lot, and a switch by manual operation has been used in a device that can be operated by hand, such as on a table stand.

In addition, the kick voltage generating circuit display uses the next induced induction voltage of the ballast by the current interruption at the end of the preheating operation in the choke ballast system, or the high voltage generation circuit based on the transistor star inverter in the resistance bellows method. Has also been proposed as a convenient means (such as Japanese Utility Model Publication No. 30-368) for separately supplying or applying a supply voltage to a conductor close to the outer wall for small fluorescent tubes of 20W or less.

By the way, in such a lighting circuit, what was requested | required by the various ballast system was to control the stable lamp current and the suitable preheating current.

While the choke bellows system is effective as a reasonable method suitable for this demand, the space to be mounted in the device must be increased in preparation for the heat generation of the choke coil at the time of lighting, so that the structure of the device is limited. Due to the structural constraints such as low design freedom and heavy load of the mechanism, there are electrical limitations such as ringing sound peculiar to the ballast and the power frequency characteristic must be considered.

On the other hand, the resistance ballast system can solve the limitation in the ballast, and in particular, the incandescent light bulb ballast itself emits light, thereby improving color rendering, power factor, efficiency, or abnormal circuit current as a luminaire. In the fuse effect due to the light bulb filament, it was good. However, the most drawback of this type of resistance ballast system in the related art was the need for a kick voltage generator circuit to be separately installed. At the end of the preheating operation, the return of the inter-electrode voltage to the supply voltage is sensed, and at this point, a high voltage is applied between the discharge electrodes to start the inter-pole discharge and at the same time, the power consumption of the generation circuit is continued when the discharge continues. In order to prevent and stabilize the discharge current (lamp current), stop the operation In order to meet the operating conditions, consist of complex electronic circuits and, as a result luminaire as there was a disadvantage that a high price.

And for a standard lighting circuit using a ballast and a glow start, using a bidirectional semiconductor switching element (e.g., an SSS element) instead of the glow start, a circuit device which improves startability, or charging half an cycle of an AC power supply. Connect the condenser and the primary side of the pulse transformer in series, arrange them in parallel to the semiconductor element, and apply the secondary output of the pulse transformer to a conductor close to the outer wall of the fluorescent discharge tube to perform active discharge start assistance. A circuit device (Japanese Patent Publication No. 49-275) is also proposed.

The lighting circuit having such a discharge start auxiliary device is effective as a kick star art fluorescent lamp due to the shortening of the preheating time, but has the disadvantages described above due to the ballast device, and the mechanism of the glowless and the starting auxiliary circuit It is relatively complex, which increases the number of parts, which is expensive.

In particular, the pulse transformer boosts the amount of electricity of the capacitor to be discharged due to conduction during black down of the conductor element, and furthermore, the capacitor is charged with the circuit voltage during the preheating operation. Since the voltage was low, the transformer was enlarged and its weight was increased in order to obtain an effective boosting ratio, which was very unreasonable for the compact and light weight of the mechanism.

SUMMARY OF THE INVENTION In view of such conventional technical means and its superiority, the present invention is based on a starter assisted by resistance bellows and pulse transformer to provide a compact and lightweight device, and at the same time, to provide a particularly inexpensive and effective lighting device for a fluorescent discharge tube. It is.

The present invention will be described with reference to the drawings.

FIG. 1 is a circuit diagram showing the apparatus of the present invention, and since the positive electrodes 2a and 2b of the fluorescent discharge tube 1 are preheated, they have a filament structure formed by winding tungsten wire, and each of the positive electrodes 2a and 2b The commercial AC power supply AC is connected to the one pole via the lighting switch 3, and the incandescent lamp 4 is inserted and connected in series as a resistance ballast in the input circuit of this power supply.

In addition, a combination of this fluorescent discharge tube 1 (eg, a preheated starter tube or a circular tube) and an incandescent bulb 4 is easy to obtain from these commercially available products. It is 60W for a 20W fluorescent lamp using a 100V commercial AC power source. / 100V incandescent bulb copper. For a 30W fluorescent lamp, a series of 100W / 100V incandescent lamps and 60W / 100V + 60W / 100V incandescent lamps for the 40W fluorescent lamp may be considered.

In addition, a preheating circuit is formed in which the poles of both electrodes 2a and 2b are connected through the glow start 5, and the glow start 5 absorbs surge voltage generated when the contact is opened and closed. A surge voltage absorbing circuit in which a noise preventing capacitor 6 was connected in parallel was provided.

Regarding such a well-known lighting circuit of the resistance ballast system, in the present invention, the ferrite core 7c of the pulse transformer 7 is wound in series with the capacitor 6 of the surge voltage absorbing circuit. The primary coil 7a is inserted into and connected.

Then, one piece of the secondary coil 7b of the transformer 7 is connected to the common bus with the first pole of the primary coil 7a, while the other pole is in close contact with the outer wall of the fluorescent discharge tube 1. It is connected to the auxiliary electrode 8 made of a material.

When the power switch 3 is closed under such a circuit arrangement, a voltage is applied to the glow start 5 through the filament portions of the incandescent bulb 4 and the positive electrodes 2a and 2b for the ballast, and the glow start ( 5) starts a glow start discharge between the opposing poles.

Due to the temperature rise in the glow start tube due to this discharge, one of the bimetal poles of the opposing poles is curved to contact the other pole, and a preheating circuit is formed so that the preheating current regulated by the incandescent bulb 4 is positive. And 2b), which is heated to initiate the release of hot electrons at these poles 2a and 2b. The time table and the preheating current characteristics are shown in FIG.

After sufficient preheating time has elapsed, the bimetal pole of the glow start 5 cools away from the opposite pole, and the preheating operation is terminated by opening the contact point, or the bimetal pole that retreats away from this contact opening point. The spark between the contacts occurs between the poles, which causes a surge voltage (see the voltage characteristic pole between the contacts of FIG. 4) between the glow start poles.

This surge voltage flows through the capacitor 6 of the absorption circuit, but acts on the primary coil 7a of the pulse transformer 7 inserted in series in this circuit.

As a result, the pulse transformer 7 receiving the surge voltage several times the power supply voltage to the primary coil 7a causes the secondary coil 7b to generate a high frequency high voltage pulse.

The secondary high-pressure pulse is applied between the auxiliary electrode 8 and the discharge electrode 2b, whereby hot electrons in the tube are attracted to the auxiliary electrode 8 to be discharged toward the downward discharge electrode, and inter-polar discharge (viscous startup) is performed. It will be.

In particular, since the applied voltage of the auxiliary electrode 8 is a high frequency, the effect can be sufficiently exhibited even without surface treatment (silicon coating or the like) of the fluorescent discharge tube 1.

의 절연선으로 권수11-20 터언(TURN)에 대하여 2차코일선 종류는 0.06

의 절연선으로 권수400-500 터언을 페라이트코어에 권취 구성하고 외형의 길이는 8.5-16mm이고 경의 길이는 8mm정도이며, 적은 중량의 구성체로 사용할 수 있다.Since the pulse transformer 7 receives a small amount of electricity but receives a surge voltage of high voltage and high frequency on the primary side, it is preferable to configure a transformer with a small capacity excellent in voltage resistance with low inductance on the primary side. The pulse trans- duction provided in the experiment showed that the linear type of the primary coil was 0.25-0.29.

The secondary coil wire type is 0.06 for turns 11-20 turns.

The winding wire of 400-500 turns are wound around the ferrite core with an insulated wire of. The outer length is 8.5-16mm and the length of the diameter is about 8mm.

sec의 주기로 되는 감쇠파형으로 파고치는 5KV정도이고, 펄스발생 기간은 20

sec정도 (60%감쇠시까지)를 얻었다.In the circuit of the above-described embodiment, the secondary output is 0.2-0.5 in operation under a 100 V commercial AC power supply.

Attenuation waveform with period of sec., crest value is about 5KV, pulse duration is 20

sec was obtained (until 60% decay).

FIG. 5 is a graph of a lighting test performed under 100 V of commercial alternating current using a 100 W / 100 V incandescent lamp (for a ballast) for each 30 W type fluorescent discharge tube (FCL30) in the example of FIG. The temperature (° C) is displayed on the vertical axis by selecting the elapsed time (seconds) until the start of inter-pole discharge (lighting) when the power is turned on, and the curve (l) shows the characteristics of the comparison circuit device in which the supply voltage is directly applied to the auxiliary electrode. The curve indicates the characteristics of the inventive device.

In the characteristic of the comparative circuit device indicated by the curve l, the area indicated by the x mark in the range of about 28 ° C or more at ambient temperature is an area in which reactivation light cannot be activated immediately after a long time light.

In addition, FIG. 6 shows the results of a lighting test of a 40 W fluorescent discharge tube using a commercial incandescent lamp of 60 W / 100 V + 60 W / 100 V under commercial AC 200 V, which is indicated as the symbol of FIG.

As can be seen from the test results, the effect of the pulse transformer using the surge voltage generated at the glow start in the apparatus of the present invention is particularly effective in the low temperature region of the ambient temperature. Corresponds to the kick-on operation in the instantaneous lighting operation zone with a preheating time of 1 second or less in the normal temperature zone, and the effect of ensuring the re-lighting operation with a voltage of 100W of 30W in the 200V zone. It is possible to shorten the preheating time as much as possible in the entire ambient temperature of the voltage (200V) tube, and to reduce the consumption of the discharge electrode of the fluorescent discharge tube due to excessive preheating, thereby extending the life.

In addition, if the lifetime of the tube and other characteristics are ignored, the apparatus of the present invention has no problem even when using a Rapid Start type as opposed to a preheated fluorescent discharge tube.

FIG. 2 shows another embodiment of the device of the present invention, in which the pushbutton switch 9 of the manual operation is replaced with the glow star art 5 in the embodiment of the above FIG. 1 display. A power switch 3 ', which is a configuration of a rotary switch, is used, and a resistance wire 10 is used in place of the incandescent lamp 4, and in particular, the auxiliary electrode 8 is omitted in the above embodiment. In this way, the pulse transformer 7 is directly arranged near a part of the outer wall of the fluorescent discharge tube 1.

Also, according to the embodiment shown in FIG. 2, the preheating operation is performed by the pressing operation of the pushbutton switch 9, and in the state where the polar discharge is confirmed by the positive electrodes 2a and 2b of the fluorescent discharge tube 1 The switch 9 can be reliably turned on instantly by releasing and releasing it.

In addition, in the illustrated embodiment, the configuration of the glow start 5 and the push button switch 9, the pulse transformer 7 and the auxiliary electrode 8, and the mutual replacement of the incandescent lamp 4 and the resistance line 10 are shown. Even if they are combined, the effect of the apparatus of this invention can fully be exhibited.

3 is another embodiment of the apparatus of the present invention, particularly in the case of using a fluorescent discharge tube (less than 30W class) in a 200V class voltage commercial power supply region.

That is, in the circuit diagram showing the device of the present invention, FIG. 1 is a circuit in which two sets of fluorescent discharge tubes 1 (30 W or less) including a preheating circuit and a starting auxiliary circuit are connected in series to their discharge electrodes 2a and 2b. As the bellows means, the fluorescent discharge tube 1 and two suitable incandescent lamps 4 '(only 200V) are brought into parallel contact with each other.

Conventionally, in order to light a fluorescent discharge tube of 30 W or less (applied to 100 V) as a practical power source of 200 V, a means for adjusting the applied voltage to 100 V using a step-down transformer serving as a stabilizer has generally been adopted.

However, according to such a means, the step-down transformer became large and expensive, so that an inexpensive mechanism could not be provided.

In addition, even in the case of a resistance bellows type, the resistance paper action part (for example, two parallel connection of the bulb suitable for the use of 200V in the case of incandescent bulbs) should be used. Therefore, in the configuration for fluorescent lamps, etc., it is necessary to use the components for the bellows equivalent to four times that of using 100V. In this case, the value of the product becomes expensive and the number of parts increases so that the assembly Difficulties were attained.

On the other hand, according to the embodiment shown in FIG. 3, since two incandescent bulbs 4 'for the blast are sufficient, the cost and assembly problems can be solved at once.

In addition, each discharge tube 1 is turned on in the normal temperature range as well as the normal lighting in the high-temperature and low-temperature zones by the start-up lighting action of the apparatus of the first invention by the pulse transformer 7 and the auxiliary electrode 8. You can certainly do this.

In this case, the function can be sufficiently exhibited even if the interchangeable components and the circuit configuration of the working parts in the embodiment shown in FIG. 2 are applied.

As described above, the device of the present invention uses a surge voltage generated excessively when the preheating circuit is opened in the resistance ballast system, inserts a small and lightweight pulse transformer into the absorption circuit, and the high frequency high voltage pulse of the secondary output. By inducing a high voltage to a fluorescent discharge tube by using a voltage as an auxiliary electrode or as a transformer directly, it exhibits not only stable lighting operation but also a remarkable effect on the starting operation such as shortening of preheating time, and furthermore, as a circuit functional element. It is sufficient to add a small, lightweight pulse transformer, and there is no substantial power consumption by this starting assistance mechanism, so that it can be produced at low cost and at an excellent effect in terms of simplification of device configuration and weight reduction of the mechanism. Especially as a small and light luminaire without changing the district, Of will.

Claims (1)

In a resistance bellows lighting circuit in which a resistor such as an incandescent lamp 4 is inserted in series in the voltage supply circuit of the fluorescent discharge tube 1, a capacitor for surge voltage absorption connected in parallel to a switch of the preheating circuit. The primary side of the pulse transformer 7a is connected in series with (6), and the secondary side 7b of the transformer is applied to the auxiliary electrode 8, or the secondary side 7b portion of the transformer is connected to the fluorescent discharge tube 1. Lighting device for a fluorescent discharge tube which is placed in close contact with or close to the outer wall of the tube.

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